The electric field 1.5 cm from a very small charged object points toward the object with a magnitude of 180,000 N/C
What is the charge on the object? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A) -4.5 nC
B) +4.5 nC
C) -5.0 nC
D) +5.0 nC
A
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A crane lifts a 425 kg steel beam vertically upward a distance of 95m How much work does the crane do on the beam if the beam accelerates upward at 1.8 m/s2? Neglect frictional forces
A) 4.0 × 105 J B) 3.2 × 105 J C) 4.7 × 105 J D) 2.7 × 105J
A Hooke's law spring is compressed a distance d and is used to launch a mass m vertically to a height h above its starting position. Under the same compression d, the spring is now used to launch a mass of 2m. How high does this second mass rise?
a. h c. h/1.41 b. h/2 d. h/4
What resolving power is needed to resolve spectral lines at 651.22 nm and 651.81 nm?
A) 1100 B) 1000 C) 1200 D) 1400 E) 1300
Uplift of the Rocky Mountains was a result of
A) compressional forces. B) tensional forces. C) crustal extension. D) none of these